A little bit off topic: I have always laughed at those "incapacitation checks".
They don't make sense to me.
First of all, an heart attack can happen at
any time , and the other pilot must guarantee the proper trajectory of the airplane, incapacitation check or not.
Second, when my copilots brief for the 80 kts incapacitation check, I often reply "Ok, let's hope you are a PILOT and know what to do if my heart attack comes at 81 knots".
In other words, an 80 knots or a 500ft incapacitation check don't guarantee anything: you've been alive till a second before, you answer "checked",
then comes the heart attack...
It really seems to me the equivalent of the sheep sacrifice of the ancients to the Gods
Isn't that ridiculous?